CVE-2018-20990 : What You Need to Know

A problem has been identified in the tar library, specifically version 0.4.16, for the Rust programming language. It is possible for arbitrary file overwrite to occur when using a symlink or hardlink in a TAR archive.

Understanding CVE-2018-20990

An issue was discovered in the tar crate before version 0.4.16 for Rust. Arbitrary file overwrite can occur via a symlink or hardlink in a TAR archive.

What is CVE-2018-20990?

This CVE identifies a vulnerability in the tar library used in Rust programming, allowing arbitrary file overwrite through symlink or hardlink manipulation in TAR archives.

The Impact of CVE-2018-20990

The vulnerability can lead to unauthorized modification or deletion of files within TAR archives, potentially causing data loss or unauthorized access.

Technical Details of CVE-2018-20990

The technical details of the CVE include:

Vulnerability Description

Vulnerability in the tar library version 0.4.16 for Rust
Allows arbitrary file overwrite via symlink or hardlink in TAR archives

Affected Systems and Versions

Product: Not applicable
Vendor: Not applicable
Version: Not applicable

Exploitation Mechanism

Exploitation involves manipulating symlinks or hardlinks within TAR archives to overwrite files.

Mitigation and Prevention

To address CVE-2018-20990, consider the following:

Immediate Steps to Take

Update to a patched version of the tar library
Avoid using symlinks or hardlinks in TAR archives

Long-Term Security Practices

Regularly update software libraries and dependencies
Implement secure coding practices to prevent symlink or hardlink vulnerabilities

Patching and Updates

Apply patches provided by the library maintainers to fix the vulnerability